time_t, suseconds_t, useconds_t - integer time
Standard C library (libc)
#include <time.h> typedef /* ... */ time_t; #include <sys/types.h> typedef /* ... */ suseconds_t; typedef /* ... */ useconds_t;
time_t Used for time in seconds. According to POSIX, it is an integer type. suseconds_t Used for time in microseconds. It is a signed integer type capable of storing values at least in the range [-1, 1000000]. useconds_t Used for time in microseconds. It is an unsigned integer type capable of storing values at least in the range [0, 1000000].
time_t C11, POSIX.1-2008. suseconds_t useconds_t POSIX.1-2008.
time_t C89, POSIX.1-2001. suseconds_t useconds_t POSIX.1-2001. <sched.h> defines time_t since POSIX.1-2008. POSIX.1-2001 defined useconds_t in <unistd.h> too.
On some architectures, the width of time_t can be controlled with the feature test macro _TIME_BITS. The following headers also provide time_t: <sched.h>, <sys/msg.h>, <sys/select.h>, <sys/sem.h>, <sys/shm.h>, <sys/stat.h>, <sys/time.h>, <sys/types.h>, and <utime.h>. The following headers also provide suseconds_t: <sys/select.h> and <sys/time.h>.
stime(2), time(2), ctime(3), difftime(3), usleep(3), timeval(3type) Linux man-pages 6.04 2023-03-31 time_t(3type)
Pages that refer to this page: timespec(3type), timeval(3type), usleep(3), feature_test_macros(7)